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The TL317 from Texas Instruments is an adjustable three-terminal positive voltage regulator designed for applications requiring a flexible output voltage. It is capable of supplying a continuous output current of 100 mA and offers an adjustable output voltage range from 1.25 V to 32 V, set by two external resistors.
This regulator integrates comprehensive overload protection, including current-limiting and thermal-overload protection, ensuring reliable operation even under fault conditions. It is easy to use and typically requires no external capacitors, though an input bypass capacitor may be needed if the device is located far from the input filter. An optional output capacitor can be added to improve transient response.
The TL317 is suitable for a wide range of applications, including power supplies, portable devices, computing, and telecommunications. Its floating nature allows it to regulate supplies with several hundred volts, provided the input-to-output differential voltage is not exceeded. It can also be configured as a precision current regulator by adding a fixed resistor between the adjustment and output pins.
The TL317 provides an adjustable output voltage from 1.25 V to 32 V using an external resistor divider.
The TL317 is available in TO-92, SOIC, SOP, and TSSOP packages.
The TL317 can deliver up to 100 mA output current.
The TL317 has a typical ripple rejection of 80 dB.
The TL317 has a typical input regulation of 0.01% per input-voltage change.
The TL317 has a typical output regulation of 0.5%.
Yes, the TL317 is a pin-for-pin alternative to the LM317L with slightly lower accuracy.